how to read a saved image from raspberry pi and how to write an image on raspberry pi

greetings of the day,

one image (cameraman.tif) is saved in raspberry pi which is available in the path of "/home/pi/MATLAB_ws/R2021b/D/srinivas/practice". In order to read the saved image from raspberry pi, i used "imread" command. But it shows an error like "The function imread uses a precompiled shared library which is not supported on the chosen target." while deploy the code on raspberry pi.

Could you please provide the solution, how to read a saved image from raspberry pi.

The written code is

function edge_database()%#codegen

r=raspi('192.168.68.192','pi','1234');

s=imread('/home/pi/MATLAB_ws/R2021b/D/srinivas/practice/cameraman.tif');

kern = [1 2 1; 0 0 0; -1 -2 -1];

file_id=fopen('/home/pi/MATLAB_ws/R2021b/D/srinivas/practice/edge_database.txt','w+');

fprintf(file_id,'edge_database program executed successful');

h = conv2(s(:,:,2),kern,'same');

v = conv2(s(:,:,2),kern','same');

e = sqrt(h.*h + v.*v);

b = uint8((e > 100) * 240);

b=cat(3,b,b,b);

displayImage(r,[s,b],'Title','edge detection')

imwrite(b,'edgeimage.png');

fclose(file_id);

In the same manner, to write one processed image on raspberry pi, i used "imwrite" command. But it shows the error like "Function 'imwrite' not supported for code generation".

Could you please provide the solution, how to write a processed image on raspberry pi.

The written code is

function edge_database()%#codegen

r=raspi('192.168.68.192','pi','1234');

s=webcam(r);

s=snapshot(s);

kern = [1 2 1; 0 0 0; -1 -2 -1];

file_id=fopen('/home/pi/MATLAB_ws/R2021b/D/srinivas/practice/edge_database.txt','w+');

fprintf(file_id,'edge_database program executed successful');

h = conv2(s(:,:,2),kern,'same');

v = conv2(s(:,:,2),kern','same');

e = sqrt(h.*h + v.*v);

b = uint8((e > 100) * 240);

b=cat(3,b,b,b);

displayImage(r,[s,b],'Title','edge detection')

fclose(file_id);

[Albert Chen]

Please refer this post:

https://www.mathworks.com/matlabcentral/answers/891992-imread-error-in-raspberry-pi-deployment